Drug interactions
Calcium carbonate + Lanthanum carbonate
Severity: Moderate
Calcium carbonate and Lanthanum carbonate: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Both agents bind phosphate and cations in the gut, and calcium carbonate may interfere with lanthanum absorption or binding behavior. Taken together, they may alter phosphate control and add little benefit.
What this interaction means in plain words
Calcium carbonate and Lanthanum carbonate can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Calcium carbonate belongs to Gastrointestinal Tract; Lanthanum carbonate belongs to Miscellaneous.
Why it happens
Cation and phosphate binding in the gastrointestinal tract, with possible interference between the two binders.
What to do
Give the antacid at least 2 hours before or after lanthanum. Monitor serum phosphate and calcium.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Calcium carbonate
Other interactions of Lanthanum carbonate
Frequently asked questions
Can I take Calcium carbonate with Lanthanum carbonate?
MediHelp rates the interaction as moderate. Calcium carbonate and Lanthanum carbonate can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Both agents bind phosphate and cations in the gut, and calcium carbonate may interfere with lanthanum absorption or binding behavior. Taken together, they may alter phosphate control and add little benefit.
How serious is the interaction between Calcium carbonate and Lanthanum carbonate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Give the antacid at least 2 hours before or after lanthanum. Monitor serum phosphate and calcium.
What other medicines interact with Calcium carbonate?
MediHelp also lists interactions of Calcium carbonate with, for example, Acalabrutinib, Alendronate, Amlodipine-hydrochlorothiazide-valsartan. The full list is on the Calcium carbonate page.
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